According to mempool data, Golden Finance reported that miners dug out empty blocks (blocks that only contain the block reward Coinbase transaction) at Bitcoin height 868664, with a time interval of only 42 seconds from the previous block height. Miners package empty blocks for economic reasons, which is the wisest choice for them. In order to fully utilize this time for mining and avoid conflicts with transactions packaged in the parent block, miners cannot fill the block with transactions, which means they can only try to mine empty blocks.